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Add "nix search" command

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This commit is contained in:
Eelco Dolstra 2017-07-17 19:02:56 +02:00
parent 3162ad5ff4
commit 90825dea51
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GPG key ID: 8170B4726D7198DE
9 changed files with 263 additions and 102 deletions
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1
src/libutil/args.cc
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@ -66,6 +66,7 @@ void Args::printHelp(const string & programName, std::ostream & out)
std::cout << renderLabels({exp.label});
// FIXME: handle arity > 1
if (exp.arity == 0) std::cout << "...";
if (exp.optional) std::cout << "?";
}
std::cout << "\n";

4
src/libutil/args.hh
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@ -164,9 +164,9 @@ public:
}
/* Expect a string argument. */
void expectArg(const std::string & label, string * dest)
void expectArg(const std::string & label, string * dest, bool optional = false)
{
expectedArgs.push_back(ExpectedArg{label, 1, false, [=](Strings ss) {
expectedArgs.push_back(ExpectedArg{label, 1, optional, [=](Strings ss) {
*dest = ss.front();
}});
}